Improvement in sash-fastenings



UNITED STATES PATENT OFFICE.

D. A. PRATT, OF NEW YORK, N. Y.

IMPROVEMENT IN SASH-FASTENINGS.

Specication forming part of Letters Patent No. 541,953, dated May Q,1866.

To all whom 'it may concern:

Be it known that I, D. A. PRATT, of the city, county, and State of NewYork, have invented a new and Improved Window-Sash Fastening; and I dohereby declare that the following is a full, clear, and exactdescription thereof, which will enable those skilled in the art to makeand use the same, reference being had to the accompanying drawings,forming part of this specification, in which- Figure L is a verticalsection of my invention applied to a window; Fig. 2, a detached rear orinner view of the same; Fig. 3, afront or face view of a portion of awindow with my improvement applied to it, a portion ofthe stile of thesash being removed.

Similar letters of reference indicate corresponding parts.

This invention relates to a new and improved fastening for window-sashes5 and it consists in the employment or use of two catches 7 or dogs,77constructed and arranged in such a manner as to securely lock the sashat any desired point within the scope of its` movement, yet admit of thesash being liberated with the greatest facility in order to move oradjust it either up or down, and at the same time automatically lock itthere at any given point, so as to prevent the sash being moved, raised,or lowered from the outer side of the window.

A represents a portion of a window-frame, and B a portion ot' the stileof a sash fitted in said frame, as usual. The edge of the stileB isnotched or serrated as shown at a in Fig. l, or only every two or threeinches, as may be preferred.

U represents a fastening composed of a metallic frame, b, in which twocatches are vfitted loosely on rods or axles d d', said catches beingcomposed of levers c c, which extend out in front ofy the stile B, so asto be operated freely by a person at the inner side of the window, andeach lever having a lateral projection or catch, d, extending from it,which projections are kept in contact with the edge of the stile B, andin the notches therein by means of springs c, which are wound around therods d and are connected to the projections d or they may be weighted soas t-o answer the same purpose.

These projections d, it will be seen by referring to Fig. 1, hold orlock the sash-one preventing it from being raised and the otherpreventing it from being lowered 5 and in order to liberate the sash thelevers c c are pressed toward each other, which throws the projectionsHout of the notches and admits of the sash moving freely. It is notabsolutely necessary that both of the projections d d be thrown out fromthe notches in the stile in order to move the sash. If the latter is tobe raised, for instance, the upper projection need only be thrown out,and the lower one thrown out if the sash is to be lowered; but it isequally as convenient to operate both levers c c at once or by onemotion of the hand as one of them, and herein consists an important partof my improvement. v

It will be seen that this fastening effectually prevents the sash beingraised or lowered from the outer side of the window by its automaticaction, and hence, when either sash is left open a t'ew inches, eithertop or bottom, for ventilation, it is by this action securely fastened.

Having thus described my invention, I claim as new and desire to secureby Letters Pat; entl. The sash-fastening in a sash-frame, with itscatches d placed on separate rods d d', arranged and constructed asdescribed, so that the point of contact with the stile B of the windowis at the center of the frame of the `fastener b.

the notches on the stile Bof the sash in the manner and for the purposeherein specified.

' D. A. PRATT.

Witnesses M. M. LIVINGSTON, ALEX. F. ROBERTS.

